Representing the data (Image, Audio, Video, Speech or Voice..) with the fewer number of bits than what it exactly requires to represent.

Basic Need of CompressionEffectively utilizing transmission bandwidth .Utilization of the storage media to the maximum.Types of Compression:

Lossless Compressing the data which almost resembles the original Input data when decompressed.

Lossy Compressing the data with some lose of information(Keeping in mind of Human Visual and Psychoacoustic system) i.e. neglecting the higher frequency components which are very less sensitive to human visual system.

JPEG Image Compression standards.In general image is nothing but a group of pixels. Pixel holds the brightness and color information of the image at a particular coordinate.Red, Green and Blue are the primary color components of the color image.With the help of these color combinations we can get the color that we deserve.